Question

The magnetic field B₀ due to current carrying circular loop of radius 12 cm at its centre is 0.50 × 10^–4 T. The magnetic field due to this loop at a point on the axis at a distance of 5 cm from the centre is –

• A. 3.5 × 10^–9 T
• B. 5.3 × 10^–9 T
• C. 9.3 × 10⁵ T
• D. 3.9 × 10^–5 T

Answer 1

Answer: (D)

3.9 × 10^–5 T

Answer 2

Use= $\left( \frac { \mathrm { R } ^ { 2 } } { \mathrm { R } ^ { 2 } + \mathrm { x } ^ { 2 } } \right) ^ { 3 / 2 }$